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Tham khảo tài liệu 'electricity infrastructures in the global marketplace part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Status of Power Markets and Power Exchanges in Asia and Australia 369 In Korea the seasonal load-demand pattern can be characterized as follows See Figure 9.15 Summer annual peak load 12 00 13 00 due to cooling load Winter peak load 23 00 due to heating load Spring the lowest load of a year without consuming neither cooling nor heating loads Besides Figure 9.16 and Figure 9.17 represent the summer peak load 47 385 MW on August 22 2003 and the winter peak load 46 387 MW on February 5 2004 respectively. Figure 9.15 Seasonal load-demand pattern Figure 9.16 Hourly load curve for summer peak load on August 22 2003. 370 Electricity Infrastructures in the Global Marketplace Table 9.7 summarizes the transmission and distribution facilities in Korea35. The transmission lines including both overhead and underground have a length of 28 260 km and the installed transformers totaled 1 672 in 2003. In addition the distribution lines run radially for a length of 376 454 km . Classification 2000 2001 2002 2003 765 kV 595 662 662 662 345 kV 7.281 7.345 7.497 7.740 Transmission 154 kV 16.747 17.576 18.144 18.595 line 664kV below 1.727 1.540 1.402 1 031 c-km DC180kV 232 232 232 232 Total 25.582 27.355 27.937 28.260 Transformer 765 kV - 1.110 7.110 7.110 capacity 345 KV 53.115 63.577 69.078 75 660 MVA 154 KV 70 886 78.119 83.364 89.228 66 KV below 1 699 1.473 1.286 1.068 Total 125.700 144.279 160.838 173.066 Distribution Route Facilities Length 351.264 358.328 366.938 376.454 km Supporter 6.439 6.695 6.875 7.171 1.000Set EA Transformer 1308.947 1428 510 1546.088 1618.889 Table 9.7 Facilities of transmission and distribution in KOREA 9.6.3 Measures in Power System Operations Figure 9.18 is a schematic showing six routes connecting metropolitan regions and others as well as a large amount of real power flows through the designated flowgates 36. More than 40 of system load is in the metropolitan region while the majority of generation is in the non-metropolitan regions. Further most .
